Influence of Pressure on Smectic A-Nematic Phase Transition
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In this article, a Landau-de-Gennes phenomenological model is proposed to describe the pressure induced smectic A-nematic phase transition, and the influence of pressure on the phase transition is discussed for varying coupling between orientational and translational order parameter with pressure.Abstract:
We propose a Landau-de Gennes phenomenological model to describe the pressure induced smectic A-nematic phase transition. The influence of pressure on smectic A-nematic phase transitions are discussed for varying coupling between orientational and translational order parameter with pressure. Increasing the pressure, the first order nematic-smectic A transition becomes second order at a tricritical point which agrees fairly well with available experimental results.read more
Citations
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Binary mixtures of nCB and nOCB liquid crystals. Two experimental evidences for a smectic A nematic tricritical point
TL;DR: In this article, a tricritical point (TCP) composition at the second order SmA to N transition has been found for the binary mixtures of 8OCB and 9OCB.
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Effect of nonmesogenic solute on the nematic-smectic-A phase transition
TL;DR: In this paper, the effect of nonmesogenic solute on the nematic-smectic-A (NA) transition is examined within the Landau phenomenological theory, and the effects of non mesogenic solutes on the Frank elastic constants are also discussed.
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Evidence of pressure dependence tricritical point at the nematic–smectic-A transition
TL;DR: In this article, the authors examined the effect of pressure on the nematic to smectic-A N-SmA transition within the Landau phenomenological theory and found that the theoretical predictions were in good qualitative agreement with experimental results.
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Thermodynamic assessment of smectic A-nematic tricritical points through the equal gibbs energy analysis.
TL;DR: The Oonk's method is extended in order to account for second-order phase transitions and allows performing calculations of the tricritical temperature.
References
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Specific Heat near the Nematic-Smectic-A Tricritical Point
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The nematic to smectic-A transition: A theoretical overview
TL;DR: In this article, the de Gennes model is used as a basis for a discussion of the properties of the nematic and smectic-A phases and the transition between them.
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Heat Capacity and Enthalpy Behavior Near Phase Transitions in Some Alkylcyanobiphenyls
TL;DR: In this article, an adiabatic scanning calorimeter has been used in a calorimetric investigation of alkyl-cyanobiphenyl (nCB) liquid crystals.
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Tricritical Behavior in a Liquid-Crystal System
TL;DR: In this paper, the isotropic-cholesteric and cholesteric-smectic-$A$ phase transitions in cholesteryl oleyl carbonate have been studied for pressures up to 7 kbar.
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High-Resolution X-Ray Study of a Second-Order Nematic—Smectic- A Phase Transition
TL;DR: In this paper, the authors carried out a high-resolution x-ray-scattering study of the critical fluctuations in the nematic phase associated with the Nematic-smectic-$A$ transition in N-$p$-cyanobenzylidene-$p-octyloxyanilene (CBOOA).